/Engine/Source/Runtime/MovieSceneTracks/Public/Systems/MovieSceneDeferredComponentMovementSystem.h
This system runs in the Initialization and Evaluaion phases: Initialization: Gathers and initializes deferred movement for any AttachParent components that need (un)link Evaluation: Gathers and initializes deferred movement for any Component Transforms; queues up an event trigger to be executed at the end of the phase Finalization: Applys all pending movement updates in reverse order
class UMovieSceneDeferredComponentMovementSystem : public [UMovieSceneEntitySystem](API\Runtime\MovieScene\EntitySystem\UMovieSceneEntitySystem)